*{
    padding: 0;
    margin:0
}
.root {
    width: 100%;
    height: 100vh;
    display: flex;
}
.aside {
    width: 200px;
    height: 100%;
    background-color: #999;
}
main {
    height: 100%;
    flex: 1;
}
.to-top {
    width: 40px;
    height: 40px;
    cursor:pointer;
    background-color: yellow;
    text-align: center;
    line-height: 40px;
    font-size: 18px;
    position: fixed;
    bottom: 40px;
    right: 8px;
    border-radius: 50%;
}
.header {
    /* width: 100%; */
    height: 80px;
    background-color: #bbb;
}
.water-fall-container {
    /* width: 100%; */
    height: calc(100%-80px);
    padding: 20px;
    overflow-x: hidden;
    overflow-y: scroll;
}
.container {
    position: relative;
    width: 100%;
}
.waterfall-item {
    position: absolute;
    transform: all .12s;
    display: flex;
    flex-direction: column;
}
.loading {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 40px;
    background-color:red;
    display: flex;
    justify-content:center;
    align-items: center;
    font-size: 20px;
}
